Rocking grate for furnaces



(No Model.)

B. S. STAPLES & R. H. ARNOLD.

ROCKING GRATE FOR FURNACES.

No. 440,286. Patented Nov. 11, 1890.

gwuemtoz Wenc mica/w UNITED STATES ATENT FFI ELISHA S. STAPLES AND ROUSE H. ARNOLD, OF SENECA FALLS, NEW YORK.

ROCKING GRATE FOR FURNACES.

SPECIFICATION forming part of Letters Patent No. 440,286, dated November 11, 1890.

Application filed May 12, 1890. Serial No. 351,501. (No model.)

T0 at whom it may concern:

Be it known that we, ELISHA S. STAPLES and RoUsE H. ARNOLD, citizens of the United States, residing at Seneca Falls, in the county of Seneca and State of New York, have made certain new and useful Improvements in Rocking Grates for Furnaces, which improvements are fully set-forth and described in the following specification, reference being had to the accompanying sheet of drawings, in which Figure 1 is a top view of the ash-pit section of a furnace or steam-generator; and Fig. 2, an enlarged sectional view of a portion of said ash-pit, having connected therewith portions of the grate, fire-pot, and jacket of a steamgenerator. Fig. 3 is a View of the under side of a portion of the fire-pot, showing one of our fixed (non-rocking) grate-sections secured thereto. Fig. 4 is an enlarged perspective view of one of the series of journal-bearings provided to support the grate-bars.

Our invention has particular relation to rocking grates; and it consists in, first, a pecu liar construction of journal-bearings to sup port the ends of the rocking sections of such grates, and, second, lugs on the fire-pot to receive and support the front and rear fixed sections of said grate.

The rocking grate itself is of a form commonly used, and consists of a series of bars m, having their opposite sides or edges serrated, the serrations of adjacent edges being so planned that the teeth of one section enter the notches of the next adjoining section. One of the grate-bars m, preferably the central one of the series, projects outward beyond the shell of the ash-pit and maybe connected by any suitable system of levers by which said grate maybe rocked. The several journaled grate-sections shouldbe connected by a bar extending underneath said sections and connected therewith by pivot-joints in a manner common to this class of grates, said means of connection forming no part of our present invention.

Referring now to the bearings that support the journals of the grate-bars, the letters N bars on, shaped like one-half of an ordinaryjournal-bearing. These removable bearings we prefer to make of malleable iron or of some 5 5 similar material that is easily worked, and we provide said removable bearings with transverse ribs t that enter corresponding depressions in the boxes N and preclude the accidental displacement of said bearings. great advantage of providing a removable bearingt at one end, instead of supporting the grate-bar ends directly in the boxes N, as heretofore practiced, lies in the fact that said boxes cannot be conveniently reached to fit o5 ward, when the journal of the grate-bar may be lifted laterally over the rigid box N and then drawn longitudinally out of the solid bearing at the other end. When so operated, it is only necessary to have sufficient clear space between the bottom of the superimposed 8o fire-pot section 0 and the removable j0urnalbearings t to allow the ribs 25 to be lifted out of the depressions in the boxes N. The bottom of said fire-pot projects well inward over the journal ends of the grate-bars, as shown in Fig. 2, and thus serves to protect said journal ends, and also to prevent them from accidentally leaving the bearings t when violently rocked.

On two opposite sides of the fire-pot or ash- 9o pit rim (preferably the front and rear sides of the former) are fixed grate-sections P. (See one of said sections in Figs. 1 and 3.) These sections have one or more outwardly-projecting lugs u, that are bifurcated at their outer ends. On the lower side of the rim B are studs 1) with enlarged heads, said studs corresponding in number and position with the gratelugs u. When a boiler is about to be assembled, the bifurcated lugs to at one end are slipped under the head of one of the studs 12 and caused to straddle the neck of said stud. The other bifurcated lugs are then swung into engagement with their respective studs, and

One 60 When it 7 0 are locked in th s position by a pin 10, that is passed through the bifurcated lugs u outside of the studs, as best illustrated in Fig. 3 of the drawings.

The described improvements allow the several grate-sections and their connections to be made-and finished cheaply and to be assembled more readily than in many of the furnaces and heaters now in use.

' Having described our invention, We claim 1. An ash-pit formed with a series of integral inwardlyprojecting boxes, having in combination therewith and seated therein a series of removable journal-bearings with. transverse ribs 25 that enter corresponding depressions in said boxes, as setforth, a series of grate-bars jonrnaled in said removable ELISHA S. STAPLES. ROUSE H. ARNOLD.

\Vitnesses:

WILLIAM S. SILsBY, BENJAMIN R. HALL. 

